DSpace Coleção: Artigo em periódico indexado (CNPASA)

Effects of dried distillers’ grains inclusion on performance, feed efficiency, carcass traits and health of feedlot lambs.

2026-08-04T13:49:07Z

Título: Effects of dried distillers’ grains inclusion on performance, feed efficiency, carcass traits and health of feedlot lambs. Autoria: FERREIRA, J.; PAIM, T. do P.; GONÇALVES, L. F.; SILVA, J. S. dos S.; LIMA, D. A. S.; SANTOS, G. A. A. dos Conteúdo: The use of agro-industrial by-products in ruminant diets has increased as a strategy to improve the sustainability of livestock production systems. This study evaluated the biological feasibility of replacing soybean meal with dried distillers’ grains with solubles (DDGS) at a practical dietary inclusion level in feedlot lamb diets. Twenty-four Santa Inês ewe lambs (27.08 ± 2.89 kg initial body weight) were assigned to a completely randomized design with two dietary treatments: a control diet without DDGS and a diet containing 6.27% DDGS (dry matter basis). The experimental period consisted of 21 days of dietary adaptation followed by 52 days of evaluation. Productive performance, feed intake, feed efficiency, in vivo carcass traits, parasitological indicators, hematological variables, and serum biochemical parameters were evaluated. Dietary inclusion of DDGS did not affect average daily gain, final body weight, body condition score, Longissimus muscle area, backfat thickness, dry matter intake, feed conversion ratio, or feed efficiency (p > 0.05). However, lambs fed the DDGS diet showed lower dry matter intake relative to body weight (p = 0.021). Parasitological indicators, including eggs per gram of feces, Famacha© score, and packed cell volume, were not affected by dietary treatment. Most hematological and serum biochemical variables were also unaffected. Lambs fed the DDGS diet exhibited lower leukocyte and neutrophil counts (p < 0.05), whereas serum urea concentration was higher (p = 0.035), likely reflecting the higher dietary crude protein content. Overall, replacing soybean meal with DDGS at a commercially relevant inclusion level maintained productive performance, carcass characteristics, and the evaluated hematological and serum biochemical indicators in feedlot lambs under intensive tropical production conditions.

Alimentação tradicional em escolas indígenas e quilombos: abordagem da Catrapovos para nutricionistas do PNAE.

2026-07-12T16:47:01Z

Título: Alimentação tradicional em escolas indígenas e quilombos: abordagem da Catrapovos para nutricionistas do PNAE. Autoria: RIBEIRO, K. M. S.; BOAVENTURA, G. C. N.; SANTOS, V. F. dos; PIRES, C. R. F.; SOUSA, D. N. de Conteúdo: O estudo analisa as percepções de nutricionistas do Programa Nacional de Alimentação Escolar (PNAE) acerca das compras públicas da agricultura familiar de povos e comunidades tradicionais, buscando compreender como essas práticas contribuem para a efetivação do direito à alimentação como dimensão essencial da cidadania e para o fortalecimento da Segurança Alimentar e Nutricional (SAN) nas políticas públicas brasileiras. A pesquisa adotou abordagem quali-quantitativa, com aplicação de entrevistas e questionários durante formação promovida a profissionais do PNAE no Tocantins. Os resultados evidenciam lacunas na capacitação sobre povos tradicionais, desafios logísticos e estruturais na execução dos cardápios e fragilidades na articulação institucional. Conclui-se que o fortalecimento da SAN requer formação continuada, políticas intersetoriais e valorização da produção local e das práticas alimentares regionais.

Role of kaolinite epigenesis in ferruginous oolitic micronodule formation in Plinthosols from Central Brazil.

2026-07-12T16:47:17Z

Título: Role of kaolinite epigenesis in ferruginous oolitic micronodule formation in Plinthosols from Central Brazil. Autoria: CAMPOS, D. S. de; VIDOCA, T. T.; BRIZZI, R. R.; BRITO, H. D.; RAMOS, M. R.; ALMEIDA, R. E. M. de; VIDAL-TORRADO, P. Conteúdo: Extensive areas of Petric and Pisoplinthic Plinthosols comprise ancient flat and stepped surfaces in the state of Tocantins, in the north-central region of Brazil. Some of these petroplinthites are derived from siltstones and sandstones of the Pimenteiras Formation (Devonian), and have been extensively investigated from pedogenetic, macro- and micromorphological perspectives. Ferruginous oolitic micronodules were identified on thin sections, always associated with alteromorphic siltstone nodules. Furthermore, the evolutionary stages of these micronodules were observed, indicating a completely pedogenetic origin. Although the formation of ooid nodules is classically associated with sedimentary and diagenetic processes, the evolution of the ferruginous oolitic micronodules identified here required detailed investigations to understand the subsequent processes. For this purpose, thin sections were prepared and systematically described using an optical microscope, and areas with the presence of oolitic micronodules were selected and subsequently analyzed using SEM-EDS. Thus, the association of ooids with the siltstones of the Pimenteiras Formation is attributed to the common presence of very fine micas, and the consequent transformation of illite crystals into kaolinite. The cyclicity between reductive and oxidative periods, inherent to the ferrolysis process, induced the epigenetic replacement of kaolinite by hematite, forming ferruginous booklets. Subsequently, the centripetal reorganization of hematite, combined with the confined space of the matrix, resulted in the formation of oval oolitic micronodules. This finding demonstrates that these relict soils retain characteristics whose identification and elucidation remain a challenge for scientific research.

A sociologia econômica e a dinâmica dos mercados da agricultura familiar.

2026-07-12T16:47:13Z

Título: A sociologia econômica e a dinâmica dos mercados da agricultura familiar. Autoria: FARIAS, S. D.; SOUSA, D. N. de; PEDROSO NETO, A. J.; FERREIRA, P. R. Conteúdo: A sociologia e a economia dedicam-se à análise do funcionamento dos mercados, especialmente no contexto da agricultura. Sob a perspectiva da sociologia econômica, este estudo bibliométrico analisa a dinâmica e os processos de construção social dos mercados agroalimentares da agricultura familiar, compreendidos como espaços socialmente construídos, inseridos em redes de relações sociais e institucionais e influenciados por processos de mercantilização, hierarquias domésticas e questões de gênero.